CN104688261B - Totally digitilized SiPM PET datas acquisition system based on FPGA and ADC - Google Patents
Totally digitilized SiPM PET datas acquisition system based on FPGA and ADC Download PDFInfo
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- CN104688261B CN104688261B CN201510120587.4A CN201510120587A CN104688261B CN 104688261 B CN104688261 B CN 104688261B CN 201510120587 A CN201510120587 A CN 201510120587A CN 104688261 B CN104688261 B CN 104688261B
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Abstract
The present invention relates to a kind of totally digitilized SiPM PET datas acquisition system based on FPGA and ADC, including several SiPM PET datas acquisition components, meet plate and image procossing computer, meet plate for receiving the packet of each SiPM PET datas acquisition component transmission, carry out that event will be met after line meets and transmit to image procossing computer, image procossing computer receive meet that plate sends meet event, and carry out PET image reconstruction.The present invention replaces traditional based on anger logic circuits, the PET data acquisition system of CFD circuits and TDC circuits completely, while PET system properties are lifted, effectively reduces the complexity of PET system, cost and construction cycle.
Description
Technical field
The present invention relates to technical field of medical instruments, more particularly to a kind of totally digitilized SiPM based on FPGA and ADC
PET data acquisition system.
Background technology
At present for almost all of based on PMT（Photomultiplier Tube, photomultiplier）PET
（Positron Emission Tomography, Positron emission computed tomography）System, CFD（Constant
Fraction Discriminator, constant fraction discriminator discriminator）And TDC（Time to Digital Converter, time number
Word is changed）Circuit is used to detect PET events（Gammaphoton）Arrival time, anger logic circuits（Peace lattice logic circuit）
With peakvalue's checking ADC（Analog-to-Digital Converter, analog/digital converter）It is used to obtain PET events position
Confidence ceases and energy information.Traditional PET data acquisition system has complex structure, operating voltage high, and magnetic field and temperature are become
Change the defects such as sensitivity.
The content of the invention
The technical problems to be solved by the invention are, there is provided a kind of totally digitilized SiPM PET based on FPGA and ADC
Data collecting system, replaces traditional based on anger logic circuits, the PET data acquisition system of CFD circuits and TDC circuits,
Lifting PET system properties（Energy resolution, temporal resolution, spatial resolution, image uniformity）While, effectively drop
The complexity of low PET system, cost and construction cycle.
Compared with PMT, SiPM possesses many merits, such as small volume, and operating voltage is low, unwise to magnetic field and temperature change
Sense, can be with scintillation crystal 1:1 coupling etc..
The present invention is achieved in that and provides a kind of totally digitilized SiPM PET datas collection system based on FPGA and ADC
System, including several SiPM PET datas acquisition components, meet plate and image procossing computer, meet plate for receiving each
The packet that SiPM PET datas acquisition component sends, carries out that event will be met after line meets and transmits to image procossing computer,
Image procossing computer receive meet that plate sends meet event, and carry out PET image reconstruction.
Further, SiPM PET datas acquisition component includes scintillation crystal, SiPM, digitized positions coding circuit, number
Word I/O, ADC and FPGA, scintillation crystal are directly connected to SiPM, SiPM（Silicon Photomultiplier, silicon photoelectricity
Multiplier tube）Be connected with digitized positions coding circuit by cable, the input of digital I/O and ADC respectively with digitlization position
Coding circuit connection is put, its output end is connected with FPGA respectively, and the output end of FPGA is connected with plate is met.
Further, digitized positions coding circuit is used for detecting the reaction position of each gammaphoton that scintillation crystal sends
Put and gammaphoton waveform and positional information are transferred to ADC and numeral I/O.
Further, digital I/O is used for receiving pixel ID（Gammaphoton response location）.
Further, ADC is used for obtaining simultaneously energy and the arrival time of PET signal.
Further, FPGA is used for that the position of PET signal, energy and arrival time are compressed and are packed, Ran Houchuan
Transport to and meet plate.
Compared with prior art, the totally digitilized SiPM PET datas acquisition system based on FPGA and ADC of the invention,
SiPM and scintillation crystal 1:The digitlization of gammaphoton response location is realized after 1 coupling by digitized positions coding circuit, so
Afterwards by FPGA（Field Programmable Gate Array, field programmable gate array）PET signal is realized with ADC
Total digitalization treatment and pack, replace completely traditional based on anger logic circuits（Peace lattice logic circuit）, CFD circuits and
The PET data acquisition system of TDC circuits, in lifting PET system properties（Energy resolution, temporal resolution, spatial discrimination
Rate, image uniformity）While, effectively reduce the complexity of PET system, cost and construction cycle.
Brief description of the drawings
Fig. 1 is the floor map of a preferred embodiment of the present invention.
Specific embodiment
In order that the technical problems to be solved by the invention, technical scheme and beneficial effect become more apparent, below tie
Drawings and Examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
It is used to explain the present invention, is not intended to limit the present invention.
Refer to shown in Fig. 1, the present invention is based on the preferable of the totally digitilized SiPM PET datas acquisition system of FPGA and ADC
Embodiment, including several SiPM PET datas acquisition components 1, meet plate 2 and image procossing computer 3.
Meet plate 2 for receiving the packet of each SiPM PET datas acquisition component 1 transmission, carrying out will after line meets
Meet event to transmit to image procossing computer 3.Image procossing computer 3 receive meet that plate 2 sends meet event, and carry out
PET image reconstruction.
SiPM PET datas acquisition component 3 includes scintillation crystal 4, SiPM 5, digitized positions coding circuit 6, numeral I/O
7th, ADC 8 and FPGA 9.
Scintillation crystal 4 is directly connected to SiPM 5, and SiPM 5 is connected by cable 10 with digitized positions coding circuit 6.
The input of digital I/O 7 and ADC 8 is connected with digitized positions coding circuit 6 respectively, its output end respectively with FPGA 9
Connection, the output end of FPGA 9 is connected with plate 2 is met.Cable 10 is used for transmitting the voltage and output needed for SiPM 5 works
Analog signal.
Digitized positions coding circuit 6 is used for detecting the response location of each gammaphoton that scintillation crystal 4 sends and incites somebody to action
Gammaphoton waveform and positional information are transferred to ADC 8 and numeral I/O 7.
Digital I/O 7 is used for receiving pixel ID（Gammaphoton response location）.
ADC 8 is used for obtaining simultaneously energy and the arrival time of PET signal.
FPGA 9 is used for that the position of PET signal, energy and arrival time are compressed and are packed, and is then transmit to meet
Plate 2.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of totally digitilized SiPM PET datas acquisition system based on FPGA and ADC, it is characterised in that including several
SiPM PET datas acquisition component, meet plate and image procossing computer, it is described to meet plate for receiving each SiPM PET number
According to the packet that acquisition component sends, carry out that event will be met after line meets and transmit to image procossing computer, at described image
Reason computer receive meet that plate sends meet event, and carry out PET image reconstruction；The SiPM PET datas acquisition component bag
Scintillation crystal, SiPM, digitized positions coding circuit, numeral I/O, ADC and FPGA are included, the scintillation crystal is direct with SiPM
Connection, the SiPM is connected by cable with digitized positions coding circuit, the input difference of the digital I/O and ADC
It is connected with digitized positions coding circuit, its output end is connected with FPGA respectively, the output end of the FPGA is connected with plate is met.
2. the totally digitilized SiPM PET datas acquisition system of FPGA and ADC is based on as claimed in claim 1, and its feature exists
It is used for detecting the response location of each gammaphoton that scintillation crystal sends and by gamma in, the digitized positions coding circuit
Light sub-waveform and positional information are transferred to ADC and numeral I/O.
3. the totally digitilized SiPM PET datas acquisition system of FPGA and ADC is based on as claimed in claim 1, and its feature exists
In the digital I/O is used for receiving pixel ID.
4. the totally digitilized SiPM PET datas acquisition system of FPGA and ADC is based on as claimed in claim 1, and its feature exists
In simultaneously the ADC is used for obtaining energy and the arrival time of PET signal.
5. the totally digitilized SiPM PET datas acquisition system of FPGA and ADC is based on as claimed in claim 1, and its feature exists
In the FPGA is used for that the position of PET signal, energy and arrival time are compressed and are packed, and is then transmit to meet plate.
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| CN104977601B (en) * | 2015-06-20 | 2017-12-15 | 明峰医疗***股份有限公司 | A kind of delay measuring method of the PET system based on SiPM |
| EP3701289A4 (en) | 2017-10-24 | 2021-08-11 | Saint-Gobain Ceramics&Plastics, Inc. | Radiation detection apparatus having an analyzer within a housing |
| CN107928692A (en) * | 2017-11-10 | 2018-04-20 | 湖北锐世数字医学影像科技有限公司 | For the method and device for meeting event screening of digital PET |
| US11255982B2 (en) | 2018-11-30 | 2022-02-22 | Saint-Gobain Ceramics & Plastics, Inc. | Radiation detection apparatus having a reflector |
| CN110673190A (en) * | 2019-09-06 | 2020-01-10 | 宁波大学 | Simple SiPM PET imaging system interface circuit |
| CN110772274A (en) * | 2019-10-29 | 2020-02-11 | 南昌大学 | Multi-pixel gamma imaging system and method |
| CN111024743A (en) * | 2019-12-19 | 2020-04-17 | 南昌大学 | Device and method for waveform sampling of positron life spectrum |
| CN111123343B (en) * | 2019-12-30 | 2023-06-27 | 南昌大学 | Imaging device and method for double-time-step PET system |
| CN112075949A (en) * | 2020-09-07 | 2020-12-15 | 北京永新医疗设备有限公司 | Method, device and equipment for quickly searching event position of Anger detector |
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| CN100563575C (en) * | 2007-03-21 | 2009-12-02 | 中国科学院高能物理研究所 | Meet system in a kind of position emissron tomography and meet method |
| EA016862B1 (en) * | 2007-11-02 | 2012-08-30 | Юниверсити Оф Вашингтон | Method and scanner for estimating start time of an electronic pulse for use in positron emission tomography |
| US8446308B2 (en) * | 2011-04-21 | 2013-05-21 | Kabushiki Kaisha Toshiba | Apparatus for detection of a leading edge of a photo sensor output signal |
| CN102772217B (en) * | 2011-05-13 | 2014-07-16 | 上海生物医学工程研究中心 | Test method and device for PET (Positron Emission Tomography) coincidence system |
| CN102274041B (en) * | 2011-05-23 | 2013-09-04 | 江苏中惠医疗科技股份有限公司 | Fully-digitalized processing device of positron emission tomography imaging electronics system |
| CN202211698U (en) * | 2011-05-23 | 2012-05-09 | 江苏中惠医疗科技股份有限公司 | Original event detection module for full-digitization processing device |
| US8884213B2 (en) * | 2011-07-06 | 2014-11-11 | Siemens Medical Solutions Usa, Inc. | Energy correction for one-to-one coupled radiation detectors having non-linear sensors |
| CN104252005A (en) * | 2013-06-26 | 2014-12-31 | 北京大基康明医疗设备有限公司 | PET detector module |
| CN203433121U (en) * | 2013-08-28 | 2014-02-12 | 明峰医疗***股份有限公司 | SiPM-based PET system |
| CN204562197U (en) * | 2015-03-19 | 2015-08-19 | 明峰医疗***股份有限公司 | Based on the totally digitilized SiPM PET data collecting system of FPGA and ADC |
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